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理科 中学生

化学変化の質量計算の問題です なんで炭素0.45のときにグラフが折れ曲がるかがわかりません。どういう計算をしたらわかるのでしょうか

2 一定量の酸化銅に反応する炭素の量について、次の 〔実験 を行った。 (実験) ① 酸化銅 6.0g と乾燥した炭素粉末 0.15gをはかり取った。 ② 酸化銅に乾燥した炭素粉末を加え、よく混ぜた後に試験管に入れ、 図1のような実験装置で十分に加熱して気体を発生させた。 ③ 気体が発生しなくなったら、 ガラス管をピーカーから取り出し、 加 熱するのをやめて、ゴム管をピンチコックでとめた。 ④その後、試験管を冷却し、反応後の試験管内にある物質の質量を測 定した。 ⑤次に、酸化銅の質量は変えずに、炭素粉末の質量を0.30g、0.45gと 変え、それぞれについて、 ② から④までの操作を行った。 図 酸化銅と炭素 粉末の混合物 ピンチコック ゴム管 ガラス管 石炭水 表は、これらの実験結果をまとめたものである。 なお、反応後の試験管内にある気体の質量は無視できるものとし、 酸化銅はと酸素が質量比41で結合していることがわかっているものとする。 表 酸化銅の質量(g) 加えた炭素粉末の質量[g] 6.0 6.0 6.0 60 20 0.15 0.30 0.45 1,35 反応後の試験管内にある物質の質量[g] 5.6 5.2 4.8 次の(1)(2)の問いに答えなさい。 (1)酸化銅の質量は 6.0g のままで、炭素粉末の質量を 0.60g、 0.75g 0.90gと変え、それぞれについて 〔実験)の② から④ま での操作を行った。加えた炭素粉末の質量と反応後の試験管内に ある物質の質量との関係を表すグラフを図2に書きなさい。 な お、表の結果もグラフにすること。 (2)酸化銅 20.0gと炭素粉末 1.5gをはかり取り、〔実験の②か ら④までの操作を行った。 反応後の試験管内にある物質の質量 は合計何gか。 また、発生した気体は何gか。 求めなさい。 (1) 図2に記入 図2 6.0 5.8 反応後の試験管内にある物質の質量 g 5.6 5.4 5.2 5.0 g 14.95 4.8 g (g) 4.6. 0.15 0.30 0.45 0.60 0.75 0.90 2 Cup+ (->2 Cut Co₂ 加えた炭素粉末の質量[g]

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英語 中学生

(1)の答えがD、(3)の答えがウ、(6)の答えがイ なんですけど、なんでそれになるかと、5⃣で3~5程の段落で分けるとしたらどこになるのか、またその段落はそれぞれどんな題名になるのかを教えて欲しいですm(_ _)m

学院) E J 5 次の英文を読んで、あとの問いに答えなさい。 < 星野改〉 High schools in Minnesota have a problem Many students are late to school. They are often tired. Some students fall asleep in class. They often get sick, too. The local governments take that as a problem. They make a small change.) It helps a school day a little later/ A lot! What do they do? They start the D- This small change makes a big difference. Why? Most teens are very tired early in the morning. They usually don't go to bed until after midnight In the morning, they wake up between 6:00 and 6:30 for school. So they don't get enough sleep! They are still tired early in the morning. But after the change/ teens are more awake and later start time is better for a teen's body clock I be ready/class/to/in). A be in ready class Everyone has a body clock. An adult's body clock works like this: most adults get tired between 9:00 and 11:00 at night. They usually go to bed before midnight. Adults can get up early in the morning. It's not a problem. But a teen's body clock is different. Teens don't get tired at midnight. They usually stay up later. But early in the morning, they need more sleep. B FO C The schools in Minnesota pay attention to the teen's body clock. They change the start of the school day from 7:20 a.m. to 8:40 a.m., 80 minutes later. Other schools in the United States change their start times too. Some schools change the time by only 30 minutes, but they still get good results. ( 2 ), the results are amazing! ③(Many) students are on time. Morning classes are easier to teach. Students are getting ①(good) grades. Students have fewer illnesses, so they are ⑤(little) absent. In Minnesota, there is another important effect: fewer students drop out of school or change schools. D Today, more and more high schools are starting later. Most schools can't start two hours later. But they can change the start time a little. A small change can make a very big difference! Just ask the students. Minnesota ミネソタ (アメリカ合衆国中央北部の州) (1) 次の英文を入れるのに最も適する位置を, 本文中のA~Dから1つ選びなさい。 Now the students are happier, and also the parents and teachers too. D(A) (2)下線部①の ( )内の語を並べかえて正しい英文を作るとき, 3番目にくるものをア~エから1つ選びなさい。 ア be イ ready ウ class I to (3) 20)( )に適するものを, ア~エから1つ選びなさい。 7 On the other hand (4) 3~50)( 1 However ウ In fact I Even so )内の語をそれぞれ比較級にかえなさい。 (3) much (5)本文の内容にあうものを,ア~エから1つ選びなさい。 more (T!) better ⑤⑤ fewer Less High school students in Minnesota are always taking classes seriously. Most teens usually go to bed as early as possible. Most adults don't stay up late because of their body clocks. I Some schools changed the school time but their students did not have good grades. 本文のタイトルとして最も適するものを,ア~エから1つ選びなさい。 7 Fewer Illnesses 1 Late Start Body Clock I Good Sleep イ (土)

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英語 中学生

(1)の答えがchoosing、(2)の答えがウ、(5)の答えがアで、それぞれなんでその答えになるのかと、 5⃣の本文を上から4行、4行、5行、4行、3行、2行で分けた時それぞれに題名を付けるとしたらどうなりますか? 教えて欲しいですm(_ _)m

5 次の英文を読んで, あとの問いに答えなさい。 <川越東改> Origami is the Japanese art of folding paper. To do origami, the artist starts with a square piece of paper. Some people like to use special origami paper that is two colors. The front of the paper is one color, and the back of the paper is another color. Other people like to use origami paper that has patterns on it. After ①(choose) your paper, you can find many instructions for folding the paper into different things. Many people enjoy (make) origami flowers, animals, or things ( 3 ). For all of these things, there are a few kinds of folds that you need to use. For example, sometimes you need to fold the paper in half. Sometimes, the paper must be folded from corner to corner. If you follow the directions carefully, you can create a beautiful paper flower or animal. However, origami is more than folding paper. First, origami is an important part of Japanese life. For example, nature is important in Japan. In Japan, people care about the seasons, weather, water, or other things in nature. Origami is also a part of nature. That is why the most popular origami shapes are things like animals. Birds, fish, flowers, and stars are all popular shapes. It is a quiet activity, and can calm the mind and body. People who do origami like the activity as much as the art. They like it because origami demands a lot of attention. When people think hard about creating something, they forget about their problems. This allows them ④ to calm down. ⑤ Origami is also good for teaching children. They also learn to work carefully. Also, origami has squares and triangles. These shapes are important in all kinds of learning. Origami helps children to learn about these shapes. Maybe you can try to do origami yourself. You only need some paper and a book of instructions. You can find instructions for many origami shapes on the Internet. instruction direction (1)①,②の( )内の語を適する形にかえなさい。 (2) 30( に適するものを, ア~エから1つ選びなさい。 (3) (4) 7 to paint with 1 to talk with 1 (2) making. to play with I to help with (イ) ④に適するものを,ア~エから1つ選びなさい。 Origami is also easy to learn. 1 Origami is also good for your imagination. Origami is also difficult to learn. I Origami is also good for your mind. ⑤にはA~Cの文が入ります。 自然な流れの文章になる配列を, ア~エから1つ選びなさい。 A Children must follow these steps exactly. B First, origami has many steps. C This way, children can learn to follow instructions. ア A-B-C イ A-C-B B-A-C I B-C-A (5)本文の内容にあうものを, ア~エから1つ選びなさい。 If you follow some instructions for paper folds, you can enjoy many different origami shapes. Learning origami gives us a good chance to help animals on the earth. You may feel tired if you try hard to do origami carefully. I The most important thing for children's education is origami. (土)

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